Seyyede Masoome SEYYEDI, Farhad RAHMATI

Regularity and projective dimension of the edge ideal of a generalized theta graph

ISSN: 1300-0098
Yayın Aralığı: 6
Yayıncı: TÜBİTAK

Let $k\geq 3$ and $G=\theta_{n_1,\ldots, n_k}$ be a graph consisting of $k$ paths that have common endpoints. In this paper, we show that the projective dimension of $R/I(G)$ equals $bight I(G)$ or $ bight I(G)+1$. For some special cases, we explain $depth(R/I(G))$ in terms of invariants of graphs. Moreover, we prove the regularity of $R/I(G)$ equals $c_G$ or $c_G+1$, where $c_G$ is the maximum number of 3-disjoint edges in $G$.

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